Which statements are required to prevent water from entering service equipment?

Which statements are required to prevent water from entering service equipment?

• A. I only
• B. II only
• C. I & II only
• D. II & III only

Answer: (C)

Water entering service equipment is prevented by making the enclosure resistant to moisture and by sealing all potential water entry paths. The essential approach is to use a weatherproof enclosure appropriate for the environment and to keep every opening protected with proper seals, gaskets, and fittings. When doors are closed with a proper gasket, conduits and cable entries are sealed, and a drip loop is used on incoming conductors, water is kept out of the enclosure and away from live parts. This combination directly reduces the risk of short circuits, corrosion, and shock hazards. So, the required statements are the ones that specify keeping the service equipment enclosure weatherproof and ensuring all entry points are properly sealed (including any measures like drip loops for conductors). The option that includes these two provisions is the correct choice because they together ensure water cannot enter the equipment.

Water entering service equipment is prevented by making the enclosure resistant to moisture and by sealing all potential water entry paths. The essential approach is to use a weatherproof enclosure appropriate for the environment and to keep every opening protected with proper seals, gaskets, and fittings. When doors are closed with a proper gasket, conduits and cable entries are sealed, and a drip loop is used on incoming conductors, water is kept out of the enclosure and away from live parts. This combination directly reduces the risk of short circuits, corrosion, and shock hazards.

So, the required statements are the ones that specify keeping the service equipment enclosure weatherproof and ensuring all entry points are properly sealed (including any measures like drip loops for conductors). The option that includes these two provisions is the correct choice because they together ensure water cannot enter the equipment.